Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16H—GEARING
  • F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
  • F16H59/02—Selector apparatus
  • F16H59/08—Range selector apparatus
  • F16H59/10—Range selector apparatus comprising levers
  • F16H59/105—Range selector apparatus comprising levers consisting of electrical switches or sensors
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
  • B60W2540/00—Input parameters relating to occupants
  • B60W2540/16—Ratio selector position
  • B60W2540/165—Rate of change
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16H—GEARING
  • F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
  • F16H59/02—Selector apparatus
  • F16H2059/0221—Selector apparatus for selecting modes, i.e. input device
  • F16H2059/0226—Selector apparatus for selecting modes, i.e. input device for selecting particular shift speeds, e.g. a fast shift speed with aggressive gear change
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16H—GEARING
  • F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
  • F16H59/02—Selector apparatus
  • F16H2059/0239—Up- and down-shift or range or mode selection by repeated movement
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16H—GEARING
  • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
  • F16H61/22—Locking of the control input devices
  • F16H2061/223—Electrical gear shift lock, e.g. locking of lever in park or neutral position by electric means if brake is not applied; Key interlock, i.e. locking the key if lever is not in park position

Definitions

• This relates generally to a shifting system including sensors and controls for controlling the shifting of a vehicle transmission in response to different movements of the shift lever and more particularly in response to different shifting behaviors of operators.
• Modern vehicles in the United States are predominately automatic shift transmissions, where an operator merely positions a shift lever in a selected gear position and then presses on an accelerator, while the vehicle systems automatically control the speed of clutch engagement and the timing of shifting.
• the operator positions a shift lever in park, reverse, neutral, or drive.
• the act of positioning the shift lever in a selected gear position is totally separate from controlling the actual shifting process, such that it does not give an operator the control provided by manually shifted transmission systems. It is desirable to come up with a design that does not require drivers to learn how to shift a manual vehicle transmission, including learning how to operate a clutch pedal, a brake pedal, and an accelerator pedal while simultaneously shifting a shift lever.
• shifting systems for automatic transmissions having an automatic shift mode (such as the well- known gear positions of "park,” “reverse,” “neutral,” and “drive” in most existing automatic transmission vehicle shifters), but also having a manual shift mode (where the shifter is movable between forced “upshift” and “downshift” positions, or where the shifter is movable between a forced fourth gear, a forced third gear, a forced second gear, and a forced first gear).
• an automatic shift mode such as the well- known gear positions of "park,” “reverse,” “neutral,” and “drive” in most existing automatic transmission vehicle shifters
• a manual shift mode where the shifter is movable between forced “upshift” and “downshift” positions, or where the shifter is movable between a forced fourth gear, a forced third gear, a forced second gear, and a forced first gear.
• clutch engagement and gear engagement is at best only indirectly affected by how hard a vehicle driver presses on the accelerator pedal of the vehicle. The driver does not directly control the clutch by any manipulation of a clutch pedal or clutch controller. The speed of shifting the shift lever into a gear position also has no direct effect on clutch operation, or engine/transmission parameters or vehicle operation. In addition to the above, different vehicle operators prefer different "feels" of clutch engagement when shifting between gear positions.
• shifters that include shift levers mechanically connected to a transmission such as by a Bowdan transmission cable or a rod-type mechanical linkage. This was done in part since mechanical connections were believed to be very reliable and trustworthy for the environment under a vehicle where a transmission is located.
• mechanically connected shift levers are expensive, relatively large, and include many parts.
• the assembly of these shifters into vehicles is labor intensive and takes up valuable assembly space.
• a shifting system for a vehicle includes a shifter including a shift lever movable between gear positions for operating a vehicle transmission, and a sensing device for sensing one of velocity and acceleration of the shift lever as the shift lever is moved toward a selected one of the gear positions.
• the present invention includes a shift system for shifting a transmission on a vehicle.
• the shifter system includes a shifter having a manually- operated shift lever movable between various gear positions.
• a sensing device is provided on the shifter for sensing positions of the shift lever including at least one position that is not a gear position.
• a controller is operably connected to the sensing device and constructed to control shifting of the transmission based on signals received from the sensing device indicative of the position and speed of movement of the shift lever.
• the controller and the sensing device provide a system that is capable of sensing the position and speed of movement of the shift lever for controlling the transmission.
• a shifter system for shifting a transmission on a vehicle includes a shifter having a manually-operated shift lever movable between various gear positions, a potentiometer on the shifter for sensing positions of the shift lever, and a controller electrically connected to the sensing device and constructed to control shifting of a transmission based on signals from the sensing device indicative of the position of the shift lever.
• a shifter system for shifting a transmission on a vehicle includes a shifter having a manually-operated shift lever movable between various gear positions, a membrane sensor on the shifter for sensing positions of the shift lever, and a controller electrically connected to the sensing device and constructed to control shifting of a transmission based on signals from the sensing device indicative of the position of the shift lever.
• the present invention includes a shifter system for shifting a transmission on a vehicle.
• the shifter system includes a shifter having a manually- operated shift lever movable between various gear positions.
• a sensor on the shifter is constructed to provide signals indicative of positions of the shift lever.
• a controller is operably connected to the sensor and constructed to control a transmission based on the signals received from the sensor.
• the controller and the sensor provide a system capable of calculating a speed of movement of the shift lever, and the controller is programmed to change control of the shifting of the transmission in accordance therewith.
• Fig. 1 is a top, side-elevational perspective view of a shifter
• Figs. 2-5 are side, top perspective views of the embodiment of Fig. 1 but disclosing a slightly different shape of a control module
• Fig. 6 is a front, top perspective view of the shifter mechanism of Figs. 2-5;
• Fig. 7 is a side-elevational view of the shifter mechanism of Figs. 1-6 showing the control module enclosed within a housing;
• Fig. 8 is a plan view of the shifter mechanism of Fig. 7;
• Fig. 9 is a rear elevational view of the shifter mechanism of Figs. 7 and 8;
• Fig. 10 is a top perspective view of a modified shifter mechanism in which the detent member is slidably mounted in a slide box;
• Fig. 11 is a partial side, top perspective view disclosing a subassembly of the shifter mechanism disclosed in Fig. 10;
• Fig. 12 is a side, top perspective view similar to that of Fig. 11 but disclosing the design of a shift lever mechanism which is different in providing a shift lever for transmitting a shorter throw to the detent member, such design being specially designed for controlling transmissions with electronic signals;
• Fig. 13 is an outline of the notches of a typical detent member as utilized in the shifter mechanisms of Figs. 1-11;
• Fig. 14 is a figure from U.S. Patent No. 5,494,141, previously referred to, and incorporated in this application so as to illustrate a type of control module;
• Fig. 15 is a circuit diagram for controlling the energization of the coil of the control module of Figs. 1-11;
• Fig. 16 is a circuit diagram illustrating a circuit for controlling an electronically controlled transmission utilizing the shifter mechanism of Fig. 12;
• Fig. 17 is a plan view of a sketch of a shifter position switch assembly for generating signals to control an electronically controlled transmission utilizing the shifter mechanism of Fig. 12;
• Fig. 18 is an end elevational view of the shifter position switch assembly of Fig.
• Fig. 19 is a side-elevational view of the shifter position switch assembly of Fig.
• Fig. 20 is a cross section taken along the plane XVIII-XVIII of Fig. 17;
• Fig. 21 is a bottom, side-elevational view of a portion of the assembly of Fig. 17;
• Fig. 22 is a rear, top perspective view of another modification of this invention.
• Fig. 23 is a fragmentary perspective view of a modified shifter embodying the present invention including a sensing device comprising a discrete location-sensing membrane potentiometer for sensing position of the shift lever;
• Fig. 24 is a fragmentary top view of the shifter shown in Fig. 23 including the membrane potentiometer and a roller operably engaging the potentiometer;
• Fig. 24 A is a schematic side view of the membrane potentiometer shown in Fig. 24;
• Fig. 25 is a plan view of a continuously sensing, variable resisting-type membrane potentiometer that can be used in place of the potentiometer shown in Fig. 24;
• Fig. 26 is a plan view of a modified sensing device including a plurality of Hall Effect sensors
• Fig. 27 is a perspective view of a sensing device operably connected between the shift lever and the shifter base, including a flexible member;
• Fig. 28 is a perspective view of another shifter embodying the present invention including a shift lever pivoted to a base and a circumferentially positioned potentiometer for sensing the angular position of the shift lever;
• Fig. 29 is a perspective view of the shifter shown in Fig. 28 but taken from a different side;
• Fig. 30 is an exploded perspective view of the shifter shown in Fig. 29;
• Fig. 31 is a perspective view of a modified shifter similar to that shown in Fig. 28, but incorporating a bar code reader;
• Fig. 32 is a perspective view of another modified shifter similar to that shown in Fig. 20, but incorporating an axially mounted encoder;
• Fig. 33 is a schematic diagram of an electrical circuit for the shifter of Figs. 28, 31, and 32;
• Fig. 34 is a schematic illustrating the speed of clutch engagement over time, and how the speed of clutch engagement can be affected;
• Figs. 35-38 are schematic diagrams showing various shift patterns and potentiometers positioned thereon to sense orthogonal movement of a shift lever; and Fig. 39 is a schematic illustrating a push-button device for controlling a transmission, the device incorporating potentiometers for sensing the speed of movement of buttons as the buttons are depressed to select gears.
• reference numeral 10 designates a base which can be constructed of metal or plastic, preferably plastic.
• a shift lever assembly 11 including the shift lever 12 and the base 13, is pivotally mounted on base 10 by means of the shaft 14 extending through the sides 15.
• the upstanding support members 16 and 17 extend upwardly from the base 10 and support the guide 18 which in this embodiment is a guide rod for slidably supporting the detent assembly 19 which includes the block 20 to which is attached or integrally formed therewith the detent member 21.
• the detent assembly including detent member 21 is slidable on the guide rod 18.
• Detent assembly 19 is operatively connected to the shift lever assembly 11 by a mechanism including the stroke multiplier assembly 22 which includes the rod 23 pivotally connected at one end 23a to the shift stick 12 by means of the pivot pin 24.
• the other end 23b of rod 22 is pivotally connected to the arm 26 by pivot pin 23c.
• Arm 26 is pivotally connected at one end by pivot pin 27 to the base 10 and at the other end 28 is pivotally connected to one end 29 of link rod 30.
• the other end 31 of link rod 30 is pivotally connected by pin 32 to the detent assembly 19.
• the stroke multiplier assembly 22 is provided to multiply the pivotal movement of lever assembly 11. Such movement is translated to the sliding movement of the detent assembly 19 so that the detent member 21 is slidable a proper distance horizontally along the base 10 to meet the stroke requirements for the transmission to which cable 33 is attached.
• This arrangement of the stroke multiplier assembly 22 can be modified to meet the stroke requirements for any specific transmission which is actuated by a cable or rod 33 connected to the top of the detent block 20.
• Module 50 controls the position of its pin 56 which in a locked position extends into a "PARK" notch "P" (Fig. 13) of the detent member 21.
• the position of the pin 56 is controlled by the magnetic attraction or repelling of the toggle linkage 52, which determines the locked or the unlocked position of the pin 56.
• Fig. 13 The position of the pin 56 is controlled by the magnetic attraction or repelling of the toggle linkage 52, which determines the locked or the unlocked position of the pin 56.
• toggle linkage 52 is mounted in housing 53 and comprises the three links 58, 59, and 40, all of which are pivotally connected together at one of their ends on the pivot pin 41a about the axis "Y. " The other end of link 58 is pivoted on the pin 42 about the fixed axis "Z. " The other end of link 59 is pivotally mounted by the pivot pin 43 to the locking member pin 56 for pivotal movement about the axis "X. " The ends of pin 43 are slidable in the groove 44b. In the locked position of locking member
• the two axes "X” and “Z” are substantially on a center line “CL” with the axis "Y” located slightly above center line “CL. "
• the distance of the axis "Y” spaced above the center line “CL” is governed by the bottom end 46 of link 40 abutting the top end of the coil 55 of the module 50. This distance is selected to provide the proper restraining force exerted by the toggle unlocking member 56, it being understood that as the axis "Y” moves away from the center line "CL, " the amount of force required to move the locking pin out of the locked position substantially decreases.
• gear selector switch 61 located in the handle 12b (Fig. 6) is not actuated.
• gear selector switch 61 actuated by the operator of the vehicle and brake switch 62 must both be closed to energize the coil 55 of the module 50.
• magnet 45 which has a south pole is normally attracted to core 57 when the coils 55 are de-energized.
• a so-called rooster comb 70 is provided which is directly connected to the shift lever assembly 11 so that it moves as the shift lever is pivoted about the axle 14.
• a leaf spring 71 attached to the bracket 72, which is in turn secured to the base 10, has a roller assembly 73 attached to its end.
• This roller assembly 73 includes a roller 73a (Fig. 8) pivotable on the pin 74 and engaging the undulations of the rooster comb 70.
• Figs. 2-6 are substantially identical to the shifter mechanism of Fig. 1. The difference is in that the shape of the module 50a is slightly different from that of module 50 as disclosed in Fig. 1. Further, it should be clear that the mechanism as disclosed in Figs. 7-9 is substantially the same as disclosed in Figs. 1-6. The only difference is that the module is shown located within a housing identified by reference numeral 50b.
• Fig. 10 discloses a modification in which the primary difference is in the guide 18 for the detent assembly designated by the reference numeral 19a.
• This guide 18 for the detent assembly is a slide block 18a having a channel 18b in which block 20a is slidably mounted.
• the connecting rod 30a is pivotally connected to the detent assembly 19a which includes block 20a and detent member 21 which can be one piece or integrally connected elements.
• Fig. 10 discloses the subassembly 80 shown in greater detail in Fig. 11.
• Subassembly 80 includes the module 50a, the slide block 18a and detent assembly 19a.
• Subassembly 80 has a decided advantage for use on shifters having different throws for different shifting transmissions.
• detent assembly 19a can include the integral parts 20a and 21 or they can be separate parts secured together in one way or another.
• a slide block 18a is integrally connected to the housing for the module 50a. It is preferred that the slide block 18a and the housing for the module 50a be molded as one piece so mat it can be mounted on different shifter assemblies.
• Fig. 12 shows another concept in which the stroke multiplier assembly 22 of Figs.
• Figs. 12 provides for a very short stroke of the detent assembly and is especially useful for generating different electrical signals for each gear position of the transmission so as to control the shifting of the transmission by electronic means rather than by connecting the transmission to the movable detent assembly 19 by a cable or rod 33 as disclosed in Figs. 1-11.
• Figs. 17-21 disclose a shifter position switch assembly comprising detent assembly
• Detent assembly 19a mounted as disclosed above in relation to the module 50 and locking element 56.
• Detent assembly 19a includes the detent member 21, block 20a, and a switch pack 90 which controls the "Shifter Position Switch" of Fig. 16.
• Block 20a includes a series of small indentations 91 on one of its surfaces. These indentations are provided for three switches 90a, 90b, and 90c mounted in line with each other in the switch pack 90 to determine which position the detent assembly is in. As the detent assembly 19a moves from one gear position to the other, the indentations cause different combinations of the switches to be opened or closed. As a result, as the detent assembly 19a is moved by the shift lever assembly 11 upon pivoting of the shift lever 12, i.e.
• switch pack 90 generates signals which control the electronic control for the transmission. It is obvious that more than three switches can be arranged if more combinations of switches are needed.
• Fig. 22 shows another embodiment of the shifter which is identical to the embodiments of Figs. 1-9 except that module 50c is a solenoid without a mechanical advantage such as the toggle linkage disclosed in Figs. 1-9. It is to be understood that within the broadest aspect of this shifter, any workable means for actuating locking member 56 in "PARK" can be utilized.
• IMPROVEMENT In the modification shown in Fig. 23, we have added an electric multi-position sensing device, i.e. , sensor 100, to sense the position of the shift lever 12. Further, we have operably connected the sensing device 100 to an on-board controller 101 or computer on a vehicle.
• the illustrated controller 101 receives input from the sensing device, determines a velocity of the shift lever 12, and is operably connected to the vehicle power train 102 to control the vehicle transmission, the vehicle clutch, and/or the vehicle engine. It is contemplated that the controller 101 could comprise a chip, microprocessor or other processor device, and can be mounted on the shifter itself or in other locations in the vehicle.
• the controller 101 can be a separate unit, or can be an integral part of a vehicle on-board controller or computer for running the vehicle power train.
• the illustrated sensing device 100 and the controller 101 make up a shifter system that provides electronic shifting of the transmission and that eliminates the mechanical connection of a shifter to a transmission (i.e. , eliminates a Bowdan transmission cable and/or other rod-type mechanical linkage), although it is noted that their function of sensing shift lever velocities can be combined with other shifter systems such as those using Bowdan cables and the like, as will be apparent from the discussion below.
• the present invention could be used with any power train system for operating a vehicle, including gas engine systems, electric vehicles, and the like.
• the present shifter system is adapted to sense, determine, and/or calculate the speed or velocity of movement of the shift lever 12, such that the controller 101 can vary control of the power train in a manner responsive to the vehicle driver's shifting behavior, as described below. It is contemplated that the controller 101 could be programmed to sense, determine, and/or calculate the acceleration of the shift lever 12 as well. Sensing/determining/calculating the velocity and/or the acceleration of a shift lever is potentially important and/or useful for several reasons. This information allows the shifter system to anticipate when to shift transmission gears. In tarn, the shifter system can be made more responsive to the shifting circumstances, as well as to the vehicle operator. Transmission gear and/or clutch engagement can be made variable, so that both a smooth engagement and a short/quick engagement are possible in the same vehicle depending on the shifting behavior of the vehicle driver.
• the illustrated sensing device 100 includes a membrane potentiometer 104 attached to a side 105 of detent assembly 19, and a spring-biased roller assembly 106 attached to module 50a for engaging the potentiometer 104.
• Roller assembly 106 (Fig. 24) includes a housing 107 attached to module 50a in a stationary position.
• An extendable carrier 108 is telescopingly and slidingly mounted within housing 107 and biased outwardly by a spring 108'.
• a roller 109 is rotatably attached to an end of the carrier 108.
• Roller 109 is positioned to roll along potentiometer 104 as the shifter 12 is pivoted between various gear positions, including park "P,” reverse “R,” neutral “N, " drive “D,” and low drive “L.
• Potentiometer 104 is a membrane-type potentiometer, such as is made by Spectra
• the membrane potentiometer 104 includes multiple layers 110-114 (Fig. 24A), at least two layers of which (i. e. , layers 112 and 114) can be pressed together to complete the circuit.
• the insulator layer 113 defines multiple discrete positions representing at least the gear positions PRND, for example. Alternatively, it is contemplated that the insulated layer 113 can be constructed to provide a continuous incrementally variable voltage signal from the potentiometer, the signal being an analog voltage signal representative of the shifter position.
• the potentiometer 104 can be operated in relatively severe environmental conditions, which is required for most modern vehicle shifters.
• the controller 101 (Fig. 23) is programmed to receive signals from the potentiometer 104 through wires 115.
• the controller 101 has a timer and/or is otherwise programmed to otherwise determine the velocity and/or the acceleration of movement of the shift lever 12, and to vary control of the transmission and shifting accordingly.
• the controller 101 could be programmed to respond to quick movement of the shift lever 12 by providing quicker, rougher, stiffer gear shift and clutch engagement in the transmission.
• the controller 101 could also be programmed to cause engine rpm to temporarily change or to cause the air/fuel mixture and/or the spark plug firing to change appropriately in response to the speed/ velocity of movement of the shift lever 12. It is contemplated that a person of ordinary skill in the art of vehicle mounted controllers for vehicle power trains would be able to program a controller in such a manner, such that a detailed description of such a program and its method is not needed herein to understand the present invention. Such a program would be based on user preferences and expectation and would be specified by a vehicle manufacturer.
• one or more discrete positions not associated with the gear positions PRNDL could be used to assist in obtaining data needed for calculating the shift lever velocity, particularly as a shift lever lifts or enters a particular gear position.
• a discrete sensor location could be located immediately prior to the discrete sensor location defining the drive position "D" so that the location of the shift lever 12 can be sensed just before the shift lever 12 enters the drive position "D. " This would allow the shifter to anticipate shifting of the transmission. By sensing the time period that expires before the shift lever 12 actually arrives in the drive position "D, " the controller can calculate a shift lever velocity and can vary control of the transmission shifting accordingly.
• Fig. 25 shows another potentiometer 104 A that can be used in place of potentiometer 100.
• Potentiometer 104 A includes a pair of parallel resistive conductive strips 120 and 121.
• Roller 109 is conductive such that as roller 109 rolls along strips 120 and 121, the roller 109 completes a circuit between the strips 120 and 121.
• This variable length represents a variable resistance that corresponds to the position of the shift lever 12. Accordingly, a voltage potentially communicated to strips 120 and 121 results in an analog signal that continuously reflects the position of the shift lever 12.
• Fig. 26 shows another sensor 100B that can be used in place of sensor 100.
• Sensor 100B includes a plurality of Hall Effect sensors 130, including at least one sensor for each of the gear positions PRNDL of the shift lever 12.
• Each sensor 130 senses the position of the roller 109 as it approaches the respective sensor 130.
• some of the illustrated sensors 130 are positioned between gear positions PRNDL to provide added data on the position of its shift lever and the shift lever velocity.
• the roller 109 could be modified so that it does not physically contact sensor 100B, but instead allows proximity sensing without physical contact, thus eliminating wear and improving assembly by allowing adjustments in the system to be made electronically instead of physically.
• sensors and sensor technology is available from various companies, such as ITT Company in Angola, Indiana, which sells Hall Effect sensors under the designation HALL 200 and similar product designations.
• Fig. 27 discloses a sensor 100C having one end 140 attached to the shift lever 12 and a second end 141 attached to a stationary location, such as module 50a.
• Sensor 100C includes a bendable and deformable body 142 that flexes as the shift lever 12 is pivoted between gear positions.
• Body 142 is constructed of material that changes its resistivity as it is flexed, thus providing an analog output voltage representing the position of the shift lever 12 at all times. Thus, it acts much like a continuous variable resistance potentiometer.
• the senor 100C could be replaced with a stretchable sensor, such as an elastic membrane with appropriate forgiving/ stretchable circuits printed therein, or that it could also be replaced with a telescoping potentiometer attached between a shift lever 12 and a stationary position, such as module 50a.
• a stretchable sensor such as an elastic membrane with appropriate forgiving/ stretchable circuits printed therein
• a telescoping potentiometer attached between a shift lever 12 and a stationary position, such as module 50a.
• the sensing devices 100, 100B, and 100C and potentiometers 104, 104A, and 104B could be used on shifters having a more conventional construction, such as shifters shown in U.S. Patent Nos. 5,277,077; 5,220,984; and 5,211,271, and the disclosures of these patents are accordingly incorporated in their entirety herein by reference.
• the present shifting technology can also be used on manual shifters and, in particular, shifters for autoclutched manual transmissions, such as those manufactured by Automotive Products - Kongsberg AS, Dyrmyrgate 45, Post Office Box 62, N-3601 Kongsberg, Norway.
• sensing devices and/or potentiometers could be placed along the orthogonal shift paths for a shift lever for manual shift transmissions having an H-shaped shift pattern.
• a shifter 150 (Figs. 28 and 29) embodying the present invention includes a base 151 and a shift lever 152 pivoted to the base 151.
• the base 151 includes a bottom 153 with apertared flanges 154 configured for attachment to a vehicle floor pan or other component.
• a pair of spaced apart pivot mounts 155 and 156 are formed on opposing sides of the bottom 153.
• the pivot mounts 155 and 156 include aligned apertures, and are configured to receive a pressfit pivot pin 157 for pivotally mounting the shift lever 152, as discussed below.
• An arch 158 is formed over mount 155, and includes an arcuate surface 159 for receiving a continuous output potentiometer 160 or other sensing device, such as the sensors previously described herein.
• a pawl mount 161 (Fig. 29) is formed generally over and inboard of pivot mount 156.
• the pawl mount 161 is supported by support walls 162 and 163, and by reinforcement ribs 164 and shift lever stop 165.
• An aperture 166 is formed in support wall 162 for reasons discussed below.
• the total height of the base e.g. , from its pivot to its sensor) may vary, but it is contemplated that it can be made as low as one inch or less depending upon the sensitivity of the sensing device and the corresponding electrical control system. For example, some sensors will satisfactorily operate over just a few millimeters stroke. This allows a bottom of the shifter to be made surprisingly and unexpectedly smaller, as compared to mechanical systems that are necessarily much larger in order to obtain enough movement for safe and sure operation.
• the shift lever 152 includes a post 168 (Fig. 30), and a molded pivot 169 attached to a bottom of post 168.
• a handle 170 is attached to a top of post 168, and includes an actuation button 171 spring-biased outwardly, but movable/depressible to close a switch 172 operably wired to the vehicle shifter control system.
• the post 168, molded pivot 69, and/or handle 170 can be integrally molded as a single molding if desired.
• the molded pivot 169 includes an enlarged transversely-elongated section 173 having a bore for receiving the pivot pin 157.
• the pivot pin 157 can be pressfit or snap locked into the pivot mounts 155 and 156, or can be retained therein by clips or fasteners attached to ends of the pivot pin 157, or in other ways known in the art for retaining pivots pins for shift levers.
• a detent-forming wall 175 extends forwardly on molded pivot 169 transversely to elongated section 173.
• Detent-forming wall 175 includes a top surface 176 and an inside surface 177.
• An arm 178 (Figs. 28 and 30) including a roller 179, a roller carrier 180, and a leaf spring 181 is attached to top surface 176 with a screw 182 so that the roller 179 moves along potentiometer 160 as the shift lever 152 is pivoted between gear positions.
• the present invention includes replacing the potentiometer 160 and roller 179 with different sensing packages, such as optical, mechanical, magnetic, electric, and other sensing arrangements.
• An arcuate channel 183 (Fig. 30) is formed on the inside surface 177 of detent- forming wall 175.
• the channel 183 includes depressions defining various gear positions including park “P,” reverse “R, “ neutral “N,” drive “D,” second gear “2, “ and first gear “ 1. "
• the angled surfaces on the sides of the gear positions are inclined to provide a desired amount of bias toward a center of the selected gear positions as a pawl engages the depressions, as described below.
• An electromechanically operated pawl module 190 (Fig. 29) is attached to pawl mount 161 of base 151.
• Module 190 includes a frame 191, a voice coil actaator 192 with an extendable rod 193 (Fig. 30), a toggle linkage 194 with bias spring 194', and a pawl 195 for engaging depressions in channel 183.
• Frame 191 is attached to pawl mount 161 with screws or fasteners 196.
• the toggle linkage 194, pawl 195, and voice coil actaator 192 with rod 193 are operably interconnected and mounted on frame 191.
• This interconnecting structure was previously disclosed herein, such as in the discussion relating to Figs. 11 and 14.
• the voice coil actaator 192 is electrically actaateable to provide different biasing forces, such that the bias of pawl 195 into channel
• a voice coil actaator 192 is believed to be novel and non- obvious in the illustrated shifter arrangement.
• a voice coil is advantageous since it provides a more efficient operation over an electromagnet while providing a smaller more compact size.
• a voice coil can be biased in either of two opposing directions, and with varying amounts of force. This allows the voice coil to provide multiple functions, such as gear position feel, gear position detenting of the shift lever, and shift lever park locking functions.
• Fig. 31 illustrates a shifter 150A that incorporates a bar code strip 200 on arcuate surface 159, and a bar code reader/sensor 201 attached to shifter 152 at surface 176 by bracket 202.
• the arrangement forms an optical encoder arrangement for sensing shift lever positions by counting or reading the bands on the strip 200. A "zero" location can be imprinted on the strip 200 if desired.
• Fig. 32 illustrates a shifter 150B having a mechanical encoder 205 operably attached to pivot mount 155 and rotatable pivot pin 157.
• the rotation of shift lever 152 rotates pivot pin 157 and results in rotating an internal portion of the encoder 205, thus resulting in sensing movement of the shift lever 150A.
• the encoder can be selected to provide the greater or lesser amounts of data on the angular position of the shift lever
• Fig. 33 shows an exemplary electrical circuit in block form, which may be used to process or otherwise relay the information obtained from the shifting mechanism of the present invention.
• the electrical circuit preferably includes one or more sensors 206 for sensing the movement and position of a shift lever, which is generally designated with reference numeral 207.
• the electrical circuit further includes a controller 208 coupled to sensor 206. Controller 208 analyzes the output from sensor 206, determines the position and velocity of shifting mechanism 207 based upon the output from sensor 206, and generates power train (engine and transmission) outputs/control signals based on preprogrammed criteria stored in either the internal memory (not shown) of controller 208, or stored in an external memory.
• an analog-to-digital (A/D) converter 209 may be provided to convert an analog output from sensor 206 into a digital numeric value for subsequent processing by controller 208.
• A/D converter 209 may be either a separate component connected between sensor 206 and controller 208 or an integral component of either sensor 206 or controller 208.
• Controller 208 preferably includes a programmable microprocessor, such as the vehicle system control processor or the transmission control processor that are typically provided in most vehicles. Alternatively, a separate processor may be provided for interacting with the transmission control processor. Such a separate processor could be provided in proximity to the shifting mechanism or may be provided anywhere else in the vehicle. In accordance with the principals of the present invention, the only significant constraints of such a processor are that it is capable of receiving output signals from the sensor(s) 206, and that it is capable of generating a control signal(s) to directly or indirectly affect the manner in which the vehicle transmission shifts between gears.
• the controller can include a timer, or a signal generated at a timed sequence can be applied to the sensor, to provide a time-indicative signal to the controller.
• sensor 206 may be configured in many different ways and positioned in many different ways relative to shifting mechanism 207.
• Sensor 206 may sense discrete positions as shown in Fig. 26, or may sense positions along a continuum as shown in Fig. 25.
• the resistance level of the sensor varies for each discrete position 130.
• the resistance of the sensor may be determined by sensing the voltage level output from the sensor. This voltage level may be converted into a digital value by A/D converter 209 and supplied to controller 208. Controller 208 may then determine the relative position of the shift lever based upon the digital value received from sensor 206 through A/D converter 209.
• the discrete positions of sensor 100B include discrete positions for each of the PRNDL positions and for positions intermediate these PRNDL positions.
• controller 208 may receive an earlier indication of when a driver has moved the shift lever from one of the PRNDL positions than it would otherwise receive if such intermediate position output signals were not provided.
• electrical output signals are only provided when the shift lever is in one of the PRNDL positions. Thus, if a driver were to shift from the low "L" position to the drive "D" position, the conventional transmission controller would only begin shifting from the low gear to one of the drive gears once the shift lever has reached the D position.
• the controller and transmission could perform numerous operations to prepare for such a shift in gears within this time. Therefore, the present invention utilizes this form of intermediate feedback from the shifting mechanism to begin the shifting process in anticipation of the shift lever subsequently reaching the D position.
• the conventional shifters that utilize electronic sensors for sensing movement of the shift lever into the PRNDL positions do not begin shifting until the shift lever has reached a position different from that in which the shift lever was previously located.
• the reason that the shifting operation is not performed as soon as the transmission controller senses that there is no output received from the sensor (indicating that the shift lever may have been moved from its last location), is that vibrations may cause the shift lever to move in and out of contact with the electronic sensor despite the fact that the shift lever has not been moved from its last position. Therefore, the conventional systems rely upon positive feedback that the shift lever has, in fact, reached a different location from its previous location.
• the electronic output signal obtained by depressing pawl switch 171 may be monitored through a connection to controller 208.
• controller 208 may not only anticipate the shifting of gears, but may also determine the velocity at which the shift lever is moved between positions.
• the velocity may also be determined by providing a plurality of discrete positions between each of the PRNDL positions, or between the R, first, second, third, fourth, and fifth gear positions.
• such velocity information may be used by the transmission controller to vary the control of a vehicle transmission clutch to produce a "harder" or "smoother" shift.
• controller 208 samples a digital value provided from sensor 206 at a predetermined rate.
• the output from sensor 206 may be converted into a digital numerical value anywhere between 0 and 255.
• the relative velocity may be determined by determining the change in the numerical value between each sample.
• controller 208 may average the velocities as they are determined or may calculate the acceleration of the shift lever based on detected changes in velocity. Based on the calculated velocity, controller 208 may access a look-up table to retrieve therefrom the appropriate control and timing signals to transmit to the various solenoids and valves within the transmission to affect the appropriate shifting profile for the detected velocity.
• a sensor such as the optical encoder shown in Fig.
• controller 208 is programmed to calculate the velocity by counting the number of equally-spaced bar code lines that the optical sensor is moved past within a predetermined time interval. Further, by counting the number of lines that the sensor has moved past since the last gear position, controller 208 may determine which gear position the shift lever is currently in and which positions it may be moving between.
• Fig. 34 illustrates variation in the control of a vehicle transmission clutch over time.
• the solid line 210 illustrates a "normal" or average engagement of a clutch, which may occur over two or three seconds, for example. Actual times may vary from this, and specifically can be much longer such as 4 seconds or more, or can be much shorter such as only parts of a second, as controlled by the controller 208.
• the line 210 illustrates a clutch fully engaged over a three-second interval with a sinusoidal-type engagement.
• Dashed line 211 illustrates a sharper/harder engagement line wherein the clutch is fully engaged over a two-second time period, such as will be programmed to occur if a driver quickly moves a shift lever into a selected gear position with a relatively rapid velocity or with quick acceleration/deceleration of the shift lever as it moves into the selected gear position.
• Dashed line 211 represents a "sport shift” type of engagement.
• the second dashed line 212 illustrates a "luxurious shift" type of clutch arrangement, where the clutch engages more slowly over a span of about four seconds.
• the dot/dash line 213 illustrates a clutch engagement that occurs over about three seconds, much like the line 210. But in line 213, most of the clutch engagement occurs between one and two seconds of time. Thus, a sharp engagement is felt by the driver as the clutch engages, but the expected time delay of about one second occurs between the initial shift lever movement and the actual engagement of the transmission.
• the change from line 210 to line 213 represents a change in the clutch engagement of about 10%, or about 0.5 second.
• the variation from line 210 to line 212 represents a change in the clutch engagement of about 25 %, or about 1.0 second.
• Figs. 35-38 represent different shifting patterns using aspects of the present invention. These figures show the flexibility of the present inventive concepts. However, it is noted that use of the present inventive concepts is not contemplated to be limited to only these disclosed embodiments.
• Fig. 35 shows a five-speed "double H" shaped shifting pattern 214, where four potentiometers 215-218 are positioned adjacent segments of the shifter path.
• potentiometer 215 is positioned along the 1-2 shift plane
• potentiometer 216 is positioned along the 3-4 shift plane
• potentiometer 217 is positioned along the 5-R shift plane
• potentiometer 218 is positioned along the transverse neutral shift plane.
• a sliding contact (not specifically shown) is attached to the shift lever that moves along and contacts the potentiometers 215-218 as the shift lever is shifted along path 214.
• potentiometers 216-218 could be used to sense movement of the shift lever from neutral into first gear, and to sense movement of the shift lever from neutral into second gear, instead of the single potentiometer 215.
• potentiometers 216-218 could be replaced with a plurality of location-specific/discrete-position sensors (see Figs. 24A, 26, and 31).
• the neutral position is considered to be a gear position.
• Fig. 36 illustrates a two-dimensional sensor pad 220 (defined by the dashed line) configured to sense movement of a shift lever along "X" and "Y" orthogonally related directions.
• the five-speed "double H” shifting path 214 is overlaid onto this sensor pad 220.
• the specific location of any point on the sensor pad 220 is read by a vehicle controller as an (X,Y) point, such that information on the exact location and movement of the shift lever is continuously provided to the controller for controlling shifting.
• controller 208 is configured with two input ports, one for receiving the X component from sensor pad 220 and one for receiving the Y component.
• a potentiometer-type, two-dimensional sensor pad such as those available from Spectra Symbol, 3101 West 2100 South, Salt Lake City, Utah 84119
• the resistivity of the sensor changes independently with respect to the X and Y directions. For example, when the shift lever is moved in plane 214 between the first and second positions, the resistivity remains constant with respect to the X output of sensing pad 220 while the resistivity appearing at the Y output varies continuously between the first and second gear positions. Given the pattern shown in Fig.
• controller 208 may determine that the shift lever is moving in the neutral plane. Similarly, if the X value is relatively constant and within a first predetermined range while the Y value is changing, controller 208 may determine that the shift lever is moving in the 1-2 shift plane. If the Y value is changing but the X value is in a second predetermined range, controller 208 may determine that the shift lever is moving within the 3-4 shift plane.
• controller 208 may determine that the shift lever is moving in the 5-R shift plane.
• clutch engagement is related to the shift lever position. For example, this allows the controller to control not only actual clutch engagement in an automatic or autoclutched manual transmission, but also allows the vehicle controller to begin taking steps to prepare for shifting, such as beginning to raise or lower certain transmission fluid pressures, and to begin to release locking or safety mechanisms.
• the engagement of a clutch may be further related to the position of the shift lever in an autoclutched manual transmission system.
• a controller may control the engagement of the autoclutch in proportion to the position of the shift lever in each one of the shift planes.
• the controller could also maintain the clutch in any partially engaged or disengaged state based on the position of the shift lever in certain intermediate locations in the shift plane.
• the shift lever would thus perform similar to a clutch pedal. When the shift lever is in a gear position, the controller would fully engage the autoclutch mechanism. When the shift lever is in the neutral position, the controller would fully disengage the autoclutch mechanism.
• the controller when the shift lever is moved from a gear position to the neutral position, the controller would disengage the autoclutch proportionally to the position of the shift lever between the gear position and the neutral position. Likewise, as the shift lever is moved from the neutral position to a gear position, the controller would engage the autoclutch proportionally to the position of the shift lever between the neutral position and the gear position. Therefore, the movement or position of the shift lever, when linked to an autoclutch through a controller, would perform similar to the movement or position of a clutch pedal.
• the shift system as described above could be used for many types of transmissions including manual transmissions, automatic transmissions or continuously variable transmissions, when the transmission is designed or adapted to provide a proportional response to the position of the shift lever.
• many types of shifting devices could be used including levers, slides, paddles or buttons.
• the shift device could .be located on the floor, in the console, on the steering wheel, on the door, or mounted to the seat.
• sensor pad 220 is shown as a two-dimensional rectangular pad, a sensor capable of sensing movement in two dimensions may be constructed using two or more one-dimensional potentiometers or by placing potentiometers at each shifter gate.
• controller 208 may readily ascertain which gear has been selected by the driver. Because the translation of actaal shift lever position to the respective shift positions is established by software rather than the mechanical construction of the shifting mechanism, the shifting pattern may be altered for different vehicles or customized for particular drivers simply by reprogramming controller 208 without requiring any change to the mechanical structural arrangement of the shifting mechanism. For example, a particular manufacturer or driver may wish to alter the shift pattern shown in Fig.
• Figs. 37 and 38 illustrate shift patterns for shifters having an automatic mode and a manual mode.
• the path is "Z" shaped and includes a first section 225 defining traditional PRND automatically-shifting gear positions.
• the second section 226 defines gear-specific positions, wherein a particular selected gear is forced onto the transmission.
• the controller would be programmed to prevent shifting in unsafe ways, such that a driver could not force a shift lever into first gear when going at a high rate of speed.
• a transverse shift-over path segment 227 is provided between sections 225 and 226. Potentiometers 228-230 are placed along sections 225-227, respectively, to sense shifter location.
• a modified segment 226A is positioned next to segment 227 and includes an upshift or " + " location and a downshift or "-" location.
• Potentiometer 229A is positioned adjacent segment 226 A where it is adapted to sense the position of the shift lever at all times.
• a manual shifting mechanism may be provided in which a transmission controller anticipates the gear into which the vehicle is going to be shifted by monitoring the movement of the shift lever between gear positions. For example, if the driver is shifting the vehicle from first gear directly to third gear, controller 208 may quickly determine that the vehicle is not being shifted into second gear as soon as it determines from the X and Y output values that the shift lever is moving in the neutral plane rather than continuing in the 1-2 shift plane toward second gear.
• controller 208 may anticipate the shift into third gear and begin sending the appropriate control and timing signals to the various internal components of the transmission in order to commence the shift into third gear before the shift lever ever reaches the third gear position.
• shifting may be performed without the delays that would be associated with a conventional electronic shifting arrangement whereby the shift into third gear would not even begin until the shift lever had reached the third gear position.
• the shifting mechanism of the present invention provides control over the transmission shifting that is very much the same as that experienced with a manual shifting mechanism utilizing a mechanical linkage. Essentially, the speed and movement of the lever can be made to simulate a clutch engagement and disengagement.
• the shifting mechanism of the present invention provides information to the transmission controller that enables it to calculate the velocity at which the shift lever is being moved so as to affect a "harder" or "smoother" shift between gears.
• the amount of variance in the feel of the shift resulting from sensing the velocity of the shift lever may vary from vehicle to vehicle. For example, the amount of variance in a luxury car may be greater than that provided in a sports car. Regardless of this difference in variance between vehicles, the shifting mechanism of the present invention may be implemented without structaral modification in each of the different types of vehicles.
• the controller 208 may be differently programmed for each type of vehicle in which it is to be installed. Such programming may be performed by the manufacturer of that particular component at their facility, or may be performed before or after installation within each vehicle at the assembly plant.
• the shifting profile for the vehicle may be programmed or modified by reprogramming at a dealership or other service center.
• the particular shifting response provided by the present invention may be customized for each individual driver's preference.
• the controller may utilize two different shifting profiles for the respective users.
• controller 208 preferably has an additional input port coupled to the vehicle accessory controller to receive a driver identification code that may be transmitted from each driver's respective key fob of a remote keyless entry system.
• controller 208 could prevent shifting into reverse when the vehicle is moving forward at any significant speed.
• controller 208 may be programmed to take into account other parameters in determining which shift control parameters to utilize during a shift between any particular gears.
• controller 208 may be programmed and configured to receive data from the vehicle's speedometer such that it also takes into account the acceleration of the vehicle at the time of a shift in addition to the velocity of the shift lever to determine the appropriate hardness or smoothness of the shift.
• Other parameters that could be utilized are the throttle position, engine speed, input shaft speed, output shaft speed, and the volume of fluid required to engage the clutches for the required shift.
• shift lever velocity or "speed" data has been described above as being used to determine the hardness or smoothness for the transmission to shift between gears, such shift lever velocity data may be utilized or manipulated in various different ways by the controllers provided in the vehicle. Further, the intermediate positional shift lever data may also be utilized in various manners different from those described above. In addition, the specific manner by which the transmission affects the change in the hardness or smoothness of a shift may also vary significantly. For example, the transmission controller may vary the speed at which the gears are moved and/or the speed at which the clutch of an autoclutched manual transmission is moved into or out of engagement in response to the sensed shifter velocity.
• controller 208 may be programmed to look at the values obtained from the sensor(s) differently depending upon whether the driver is shifting up or shifting down. For example, it may be desirable to increase the hardness of the shift with increasing shift lever velocities when shifting into a higher gear, while being undesirable when shifting into a lower gear since a smooth shift into a lower gear is almost always more desirable unless the vehicle is a sport car, in which case it may be desirable to enable the driver to cause a harder shift by moving the shift lever faster even when shifting into a lower gear.
• Controller 208 may also look at the positional data received from the sensor(s) differently, based upon whether the shift lever is being moved from a gear position or into that gear position. For example, when the shift lever is in the first gear position, the controller will consider the shift lever to be in the first gear position so long as the digitized value(s) received from the sensor(s) is/are within a first predetermined range. When the shift lever is moved from the first gear position, such that the output from the sensor(s) is no longer within the first predetermined range, controller 208 will consider the shift lever as no longer being within the first gear position. On the other hand, controller 208 may establish a different predetermined range to define the first gear position, when the shift lever is being moved from another gear position into the first gear position. Thus, a hysteresis may be established between any two gear positions by appropriately programming controller 208.
• the primary advantage provided by the present invention is to provide additional information from a vehicle shifting mechanism to which a processor within the vehicle may be programmed to respond.
• the specific manner in which such processors are programmed to respond to this additional information is expected to vary considerably amongst the numerous vehicle manufacturers and amongst those drivers who wish to customize the performance of their vehicles.
• Push-buttons 235-238 for selecting gear position PRND are located in a module or instrument panel 239. By pressing one of the push-buttons 235-238, a corresponding one of switches 239-242 is activated for controlling a vehicle transmission.
• Potentiometers 243-246 correspond to push-buttons 235-238, and are connected to a vehicle controller 247 to sense the velocity of force or movement when the buttons 235-238 are depressed. Similar systems/sensors are used in electronic piano keys, for example, so that the loudness of sound generated matches the hardness that a piano key is struck.
• switches 239-242 can be eliminated by programming controller 247 to sense that push-buttons 235-238 have been depressed, as well as to sense the velocity of the depression.
• the present sensing system is useable on manually-clutched manual transmissions as well as autoclutched manual transmissions and "clutchless” manual transmissions.
• Autoclutched manual transmission systems are different than “clutchless” manual transmissions in that the "clutchless” manual transmissions require a manual connection to the gear box. In the "clutchless” manual transmissions, the operator still actually moves the gears through a cable or other mechanical link. Only the clutch function is automechanized.
• An autoclutch manual transmission automates both clutch and gear change functions, but does so with mechanisms attached to the transmissions, as opposed to automatic transmissions where components are incorporated into and inside of the automatic transmission casing. All transmissions can be at least partially controlled by some sort of processor, which in tarn receives electrical signals from the shifter.

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Arrangement Or Mounting Of Control Devices For Change-Speed Gearing (AREA)
• Control Of Transmission Device (AREA)

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• 1998
  • 1998-07-10 JP JP2000502954A patent/JP2001510114A/ja active Pending
  • 1998-07-10 EP EP98934420A patent/EP0996553A2/en not_active Withdrawn
  • 1998-07-10 WO PCT/US1998/014365 patent/WO1999003696A2/en not_active Application Discontinuation
  • 1998-07-10 BR BR9811278-3A patent/BR9811278A/pt not_active Application Discontinuation

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